Mold



Jan 1, 1924- 1,479,629

E. G. SICARD Mow Filed Oct. 15 1921 I W7 A TTORNEY P -ATENT'OFFl-CE.

ERNEST GRIDLEY SICARD, OF NEW YORK, N. Y.

MOLD.

' Application filed October 15, 1921. Serial No. 507,966.

To all whom it ma concern:

Be it known t at I, ERNEST GnlnnnY SIoARD, a citizen of the United States. of America, residin at New York, county of New York, and tate of New York (whose post-ofiice address is 347 Fifth Avenue, New York, N. Y.), have invented certain new and useful Improvements in. Molds, of which the following is a specification. I

My invention relates to molds especially adapted for casting metals or alloys which chill rapidly in pouring. Casting high speed steel or alloys of the character of stellite has been practiced in a straight mold,'a single piece at a-time, for the reason that the fluid metal chills so rapidly that it cannot, for example, be made toflow from a gate into a number of radial passages. To overcome this difficulty Ihave made the moldwhich I will now proceed to describe The accompanying drawing will serve to illustrate my invention, in which,

Fig. 1 is a vertical section of a mold with the top of the chamber and the mechanism for rotating the mold shown in elevation.

Fig. 2 is a plan view taken on the line a-a of Fig. 1.

Fig. 3 is a vertlc'al section taken on the line b?) of Fig. 2 and showing modification.

Referring to the drawings, 5 is a containing chamber mounted upon the standards 66. The containing chamber is provided with a movable cover '7, and also with a pipe 8 which may be connected to an air pump or other means for exhausting air from the interior of the chamber, or conversely introducinga neutral .as. Situated within the chamber is a circu ar disc 9 secured to a shaft 10, which has its low hearing mounted in a sup ort 11. Secured also to this shaft an'is a evel gear 12 in mesh with the beve pinion 13 mounted on the end of the'shaft 14, connected to an electric motor 15, or to other means for imparting a rotating motion to the parts 14 and 10, and through the shaft to disc 9.. Mounted on top of "the disc9 are plates 16 and 17.

Formed in these plates is the central cylindrical opening. 18 and radial space grooves '19. The opening 18 and grooves 19 in the plates 16 and 17 register with each other when the plates are in assembled position. Located around the circumference of the plates 16 and 17 isa ring 20 provided with an adjustment and clamping screw 21. Ar- 7 ran ed external to the ring 20 and secured tot e plate 9, at an equal distance apart around the periphery of the plate 9 are small angleplates 22 connected to the plate 9 by screws 23. The purpose of the ring 20 is to close the outer ends of the radial slots 19, and the purposeof the angle plates 22 is to center the plates. 16 and 17 and the ring.

20 on the plate 9. Located in a centrally located recess 24 in the plate 16' at the bottom of opening 18 is'a disc-25 made of material having; a high fusing point and low conductivity for heat. In place of using such a disc 25 I may use. the arrangement shown in Fig; 3 where the disc 25 is made of metal, and is provided' in the interior. with means for heating the disc 25, such as an electric heating coil 26. The plates 16 and 17 and disc 25 of Fig. 3 may b'e made of any suitable metal such. as cast iron or steel. When, howevenl'he disc of' the form shown in Fig. 1 is used I prefer to construct it of a material having, as before stated, a high fusing pointand lo.w conductivity such,

for instance, as carbon, magnesite' or car.

made of the same materal as the plates 16 and 17,'that is, without the provision of means, such as disc .25, for preventing the chilling of the metal.

The plate 17 is provided with a central I .hollow hub 27 which supports a metal ring 28 above it. The ring is provided with an inner lining of refractory material 31.

The operation of my mold is as follows The fused metal is poured in the opening 30 and passes downward strikes the disc 25, at 'which'time the plate 9 andthe parts supported by it are rotating. The rotary motion of the arts causes the metal, upon striking the iso 25,. to fiow into and fill the grooves 19. When the metal is sufliciently removethe casting. The metal parts which have flowed into the groove 19 can then be separated from the gate 32, which occupies the opening '18; The separated ortions of metal which have been cast in t e grooves 19am now ready for; use in the conditlon in which the are cast or they may be subqected to su sequent heating treatment if case, is at .the

I other metals, especially those which chill" easilyyor where the melted metal is less fluid the rotation of the mold forces the of metals, ll find that it is not necessary to rotate the mold while pouring, while with metal by centrifugal force into the ends of the radial slots or grooves.

It will be observed that in the drawing the mold is shown as located within the chamber 5; the purpose. of this is to prevent access of free air to the interiorof the mold. "The air in the interior of the chamber can be exhausted if desired at'outlet 8, or con-' versely the interior of the chamber 5 can be filled with a neutral gas or a reducing gas.

In practice when the chamber 5 is used and is to be exhausted, the cover 7 is removed,-

the pump being stopped and the metal is then poured into the mold. As soon as the gate is full the cover 7 is fastened down, and

- the air pump started in operation, exhausting the air, causing the metal to flow to all ings removed from the mold.

parts ofthe mold. Upon cooling the pump is stopped and air is permitted to fill the chamber 5" at atmospheric pressure, after which the cover 7 can be raised and the cast- Having'thus described my invention I gate,-made of material havinga high fusing radial slots communicating with the bottom 1.:A'mold comprising a central openingor gate, means situated at the bottom of the .point and low conductivity, and a series of or the gate.

v 2. A moldhaving a central opening or ,7 gate a dis csituated at the point off-impact of the filuid'metal, said disc constructed to imaeae prevent chilling of the metal when striking the disc, a series of radial'slots communicating at one end with the ate, and means for rotating the mold as a W ole.

' 3. A mold conslsting of an enclosing chamber, a disc adapted to be rotated from without the chamber, and located within the chamber, a air of plates mounted on the .disc, having ra ial slots and a central opening, a body having a high fusing point and low conductivity located in the center of the lower disc, and a gate supported by the upper disc. 4:. A mold comprising a central opening or gate, a carbon disc situated at the bottom a of the gate, anda series of radial ,slots, com- 'municating with the bottom of the gate.

. .5. A mold comprising a central opening,"

or gate, a disc of carbon situated at the point of impact of the fluid metal, and a series of radial slots, communicating at one end with the bottom of the gate.

6. A mold comprising ,a central opening or gate, a disc situated at the bottom'of the gate, and having a fusing point and conductivity, corresponding to that of carbon' and a series of radial slots communicating with the bottom of the gate.

7.. A moldadapted to-impart a chill to a fluid metal introduced into the mold, said mold consisting of a central opening or gate,

a body of refractory material of low con ductivity, situated at the bottom of the gate,- and a series of radial slots communicating at one end with the gate, together with meansfor rotating the mold as a whole.

- 8. A mold con'sistingof avbod' of metal adapted to impart a chill to a -uid metal introduced into it, said body having a vertically arranged central opening or gate, and

a series of horizontally disposed radial slots comi nunicatin with said gate, together with means situate in the bottom of the gate, which will prevent chilling of the fluid metal when introduced into the mold. I lln testimony whereof, ll am my signature, in the presence of two'witnesses.

icnnns'r camper SJICARD.

lli 'itnesses': h

HENRY Peron BALL, lllnonrnon A. GHAJPIPIE. 

